Turbine-wheel.



No. 873,241; PATENTED DEC. 10, 1907 k E. IMLE.

TURBINE WHEEL. APPLICATION FILED JUNE 13,1907.

' STATES P E T OFFICE.

EMIL IMLE, wEIssER riIRscH, NEAR DRESDEN, GERMANY.

TURBINE-WHEEL.

To all whom it may concern. M

of the German Emperor, residing at Weisser Hirsch, near Dresden, German Em ire, have invented certain new and useful In rovements in Turbine-Wheels, of which t e following is a specification.

The present invention relates to improve pecially to means for securing the peripheral blades to the wheel body.

The manufacture of rapidly revolving turbine wheels for elastic fluid and liquid motive blades so intimately with the wheel body, that the parts practic'ally' form an integral a ents is a difficult operation, since the blades, especially in as and steam turbines are rather small an must be reliably secured in=large numbers on the wheel proper, in order to prevent them from being torn loose by the great centrifugal strain they are. subjected to.

According to my invention I weld the body, so 'at there is no danger of the blades flyingofl. Besides, this, my improved con struction of wheel is relatlvely cheap and easyof manufacture.

In order to make the invention morereadily understood, I will now describe it with reference to-the accompanying drawing, in

g which shown in rear elevation. Fig. 2 is :a section,

Figure 1 shows a -section through the wheel rim on a radial plane, a blade being on a plane .at'right angles to that of Fig. 1, the b is a plan view ofpart 'of a wheel and five blades.

Figs. 4 and 5 are views, similar to Fig. 1 and ig. 2, ofa modification; Fig. 6

is a view similar to Fig. 1., with a wire inserted in the annular groove before welding.

.Fig. 7 is a similar View with the annular metal before groove filled with solder or like welding. V

Referring to Figs. 1 and 2, the wheel body or rim a is provided on one side near the periphery with an annular concentric groove b.

The blades c which are of crescent shape in acrossthe groove?) and a short distance bebody. The. parts are and a lateral opening intersecting said radial yond into the wheel then welded together.

' Specificationfof Letters Patent. Application filed June13.1907.. SerialNo. 878.847.

.the other parts.

ades shown in side elevation. Fig. 3

Patented Dec. 10, 1907.

and 5, there are provided, instead of the an- .nular roove 1), separate lateral bores f for each b ade foot d, extending inwardly from the side face of the wheel rim or-body and In .the modification illustrated in Figs; 4 Be it known that I, EMIL IMLE, a subject inserted in the radial bores the} project into I their corresponding lateral boresf.

-In the modification shown in Fig. 6 a wire 6 1s inserted in and partially fills the groove 1) prior to welding and is welded together with.

' InFig. 7, I have illustrated how the annular groove 6 may be filled with melted metal such for instance as a very hard solder as at g, which durin the operation of welding becomes thorough While any known method of welding may be used, I prefer the process known in-Ger ly united to the other parts. I

many as autogenous welding, wherein the parts to be welded togetherare brought to welding heat or li ueficatiolr by a suitable hydrocarbon or the h e flame, or the electric arc, whereby if desired, a wire or solder may be used as in Figs. 6 and 7, to fill out any vacant spaces. This fillin may be of the same, or approximately t e same, material as the parts to be welded.

' The welding is performed by directing the flame, (which needs not to be large,'often a few millimeters being sufficient), to where the welding is to take place, thatis in the present instance, into the groove (ion at the ores e. The blade feet and the wall of the wheel openings are thereby heated and. fused. .At the same time the filling, if used,

is heated, sothat it intimately combines with the other parts to form' an integral-body.

Thewelding thus is purely local.

The ad'acent parts are not aflected by the welding ame, which, considering the delicacy of the small blades, is of great .value.

.It is not absolutely necessary to use a filling, as often the parts to be welded so fuse together. that they become integral. What I claim is:

1. A turbine wheel having a radial bore, and an opening communicating therewith, andblades provided with afoot inserted into said radial bore, the parts bein welded together to form an integral b o( y, substantially as set forth.-

2. A turbine wheel having a radial bore bore, and a blade rovided with a foot-inserted into said ra ial bore, the parts being welded to ether to form an integralv body,

substantial ly as set forth.

to form an integral body, substantia 1y as i vlded with. feet inserted into said radial. bores, and metal filling in said groove, the,

parts being welded to ether to form an integral body, substantial? as set forth.

5. A turbine Wheel having .an annular groove in its side and radial bores in its periphery intersecting said groove, blades provided with feet inserted into said radial bores, and .a wire in said groove, the parts being welded to ether to form an integral body, substantial y as set forth.

, In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

EMIL IMLE. Witnesses:

ULYSSES J BYWATER, CLARE SIMON. 

